Scientists are trading telescopes for aprons this week to sell Milky Way cupcakes, Saturn cake, and chocolate chip Opportunity cookies in an effort to salvage U.S. planetary science projects.

The 2013 budget proposal submitted by the Obama administration earlier this year would cut funding for NASA's planetary science projects by about $300 million. While Congress is still deliberating over the federal budget, groups of scientists are planning a series of demonstrations — in the form of bake sales, car washes and other events — for Saturday to plead their case.

Science editor Alan Boyle's blog: "Astronaut Abby" is at the controls of a social-media machine that is launching the 15-year-old from Minnesota to Kazakhstan this month for the liftoff of the International Space Station's next crew.

Though planet-studying spacecraft usually cost millions, or even billions, of dollars, every penny helps. That's the reasoning behind the Planetary Exploration Car Wash and Bake Sale to be held by University of Central Florida students and professors who hope to sway lawmakers into providing more money for studying the solar system. It is one of nearly 20 planned demonstrations for Saturday at sites across the country, organizers said.

"We're not asking for more of the pie, we're asking for less of a bite out of the pie," Laura Seward, a graduate student at the university who organized the event, said in a statement. "A strong robotic planetary exploration program is essential for a strong human planetary exploration program."

The University of Central Florida's bake sale is part of an overall effort sponsored by the Southwest Research Institute in Boulder, Colo., to fight against the proposed budget cuts.

"This is being done to attract media attention and to help focus Congress on repairing the damage of the deep cuts planned to NASA's planetary science program," said Alan Stern, the institute's associate vice president for research and development. "It's important these cuts be repaired to maintain U.S. leadership in this area of science, to prevent mission cuts, and to prevent student and research job losses." [ NASA's 10 Greatest Science Missions ]

Other organizations planning to participate in the demonstrations include the Search for Extraterrestrial Intelligence (SETI) Institute in Mountain View, Calif.

"The nation risks the loss of a generation of upcoming, talented engineers and researchers whose careers are centered on the exploration of our solar system in the quest for life beyond Earth," said astronomer Jill Tarter, the outgoing director of the Center for SETI Research.

NASA has a number of ongoing planetary science missions, including the Cassini orbiter around Saturn, the New Horizons spacecraft on its way to Pluto, and the Mars Science Laboratory rover Curiosity, due to land on the Red Planet in August. The agency also has a number of missions under development, such as the OSIRIS-Rex asteroid sampling mission due to launch in 2016.

Yet the number and scope of projects NASA will be able to undertake in the future could be seriously hampered by the proposed cuts, scientists say.

For Central Florida residents: The planetary bake sale is planned for 10 a.m. to 3 p.m. EDT Saturday at the Chevron adjacent to the University of Central Florida campus on 1640 E. McCulloch Road in Orlando.

Southern stargazing

Stars, galaxies and nebulas dot the skies over the European Southern Observatory's La Silla Paranal Observatory in Chile, in a picture released on Jan. 7. This image also shows three of the four movable units that feed light into the Very Large Telescope Interferometer, the world's most advanced optical instrument. Combining to form one larger telescope, they are greater than the sum of their parts: They reveal details that would otherwise be visible only through a telescope as large as the distance between them.
(Y. Beletsky / ESO)
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A balloon's view

Cameras captured the Grandville High School RoboDawgs' balloon floating through Earth's upper atmosphere during its ascent on Dec. 28, 2013. The Grandville RoboDawgs’ first winter balloon launch reached an estimated altitude of 130,000 feet, or about 25 miles, according to coaches Mike Evele and Doug Hepfer. It skyrocketed past the team’s previous 100,000-feet record set in June. The RoboDawgs started with just one robotics team in 1998, but they've grown to support more than 30 teams at public schools in Grandville, Mich.
(Kyle Moroney / AP)
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Spacemen at work

Russian cosmonauts Oleg Kotov, right, and Sergey Ryazanskiy perform maintenance on the International Space Station on Jan. 27. During the six-hour, eight-minute spacewalk, Kotov and Ryazanskiy completed the installation of a pair of high-fidelity cameras that experienced connectivity issues during a Dec. 27 spacewalk. The cosmonauts also retrieved scientific gear outside the station's Russian segment.
(NASA)
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Special delivery

The International Space Station's Canadian-built robotic arm moves toward Orbital Sciences Corp.'s Cygnus autonomous cargo craft as it approaches the station for a Jan. 12 delivery. The mountains below are the southwestern Alps.
(NASA)
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Accidental art

A piece of art? A time-lapse photo? A flickering light show? At first glance, this image looks nothing like the images we're used to seeing from the Hubble Space Telescope. But it's a genuine Hubble frame that was released on Jan. 27. Hubble's team suspects that the telescope's Fine Guidance System locked onto a bad guide star, potentially a double star or binary. This caused an error in the tracking system, resulting in a remarkable picture of brightly colored stellar streaks. The prominent red streaks are from stars in the globular cluster NGC 288.
(NASA / ESA)
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Supersonic test flight

A camera looking back over Virgin Galactic's SpaceShipTwo's fuselage shows the rocket burn with a Mojave Desert vista in the background during a test flight of the rocket plane on Jan. 10. Cameras were mounted on the exterior of SpaceShipTwo as well as its carrier airplane, WhiteKnightTwo, to monitor the rocket engine's performance. The test was aimed at setting the stage for honest-to-goodness flights into outer space later this year, and eventual commercial space tours.

Red lagoon

The VLT Survey Telescope at the European Southern Observatory's Paranal Observatory in Chile captured this richly detailed new image of the Lagoon Nebula, released on Jan. 22. This giant cloud of gas and dust is creating intensely bright young stars, and is home to young stellar clusters. This image is a tiny part of just one of 11 public surveys of the sky now in progress using ESO telescopes.
(ESO/VPHAS team)
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Fire on the mountain

This image provided by NASA shows a satellite view of smoke from the Colby Fire, taken by the Multi-angle Imaging SpectroRadiometer aboard NASA's Terra spacecraft as it passed over Southern California on Jan. 16. The fire burned more than 1,863 acres and forced the evacuation of 3,700 people.
(NASA via AP)
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Where stars are born

An image captured by NASA's Spitzer Space Telescope shows the Orion Nebula, an immense stellar nursery some 1,500 light-years away. This false-color infrared view, released on Jan. 15, spans about 40 light-years across the region. The brightest portion of the nebula is centered on Orion's young, massive, hot stars, known as the Trapezium Cluster. But Spitzer also can detect stars still in the process of formation, seen here in red hues.
(NASA / JPL-Caltech)
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A long, long time ago...

This long-exposure picture from the Hubble Space Telescope, released Jan. 8, is the deepest image ever made of any cluster of galaxies. The cluster known as Abell 2744 appears in the foreground. It contains several hundred galaxies as they looked 3.5 billion years ago. Abell 2744 acts as a gravitational lens to warp space, brightening and magnifying images of nearly 3,000 distant background galaxies. The more distant galaxies appear as they did more than 12 billion years ago, not long after the Big Bang.
(NASA / NASA via AFP - Getty Images)
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Frosty halo

Sun dogs are bright spots that appear in the sky around the sun when light is refracted through ice crystals in the atmosphere. These sun dogs appeared on Jan. 5 amid brutally cold temperatures along Highway 83, north of Bismarck, N.D. The temperature was about 22 degrees below zero Fahrenheit, with a 50-below-zero wind chill.